test/hotspot/jtreg/gc/shenandoah/TestVerifyJCStress.java
author rkennke
Thu, 04 Jul 2019 14:28:31 +0200
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8226757: Shenandoah: Make traversal and passive modes explicit Reviewed-by: shade
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/*
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 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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/*
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 * @test TestVerifyJCStress
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 * @summary Tests that we pass at least one jcstress-like test with all verification turned on
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 * @key gc
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 * @requires vm.gc.Shenandoah & !vm.graal.enabled
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 * @modules java.base/jdk.internal.misc
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 *          java.management
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 * @run main/othervm  -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions
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 *                    -XX:+UseShenandoahGC -Xmx1g -Xms1g
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 *                    -XX:+ShenandoahVerify -XX:+VerifyObjectEquals
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 *                    -XX:ShenandoahGCMode=passive -XX:+ShenandoahDegeneratedGC
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 *                    TestVerifyJCStress
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 *
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 * @run main/othervm  -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions
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 *                    -XX:+UseShenandoahGC -Xmx1g -Xms1g
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 *                    -XX:+ShenandoahVerify -XX:+VerifyObjectEquals
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 *                    -XX:ShenandoahGCMode=passive -XX:-ShenandoahDegeneratedGC
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 *                    TestVerifyJCStress
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 *
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 * @run main/othervm  -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions
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 *                    -XX:+UseShenandoahGC -Xmx1g -Xms1g
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 *                    -XX:+ShenandoahVerify -XX:+VerifyObjectEquals -XX:+ShenandoahVerifyOptoBarriers
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 *                    -XX:ShenandoahGCHeuristics=adaptive
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 *                    TestVerifyJCStress
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 *
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 * @run main/othervm  -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions
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 *                    -XX:+UseShenandoahGC -Xmx1g -Xms1g
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 *                    -XX:+ShenandoahVerify -XX:+VerifyObjectEquals -XX:+ShenandoahVerifyOptoBarriers
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 *                    -XX:ShenandoahGCHeuristics=static
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 *                    TestVerifyJCStress
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 *
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 * @run main/othervm  -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions
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 *                    -XX:+UseShenandoahGC -Xmx1g -Xms1g
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 *                    -XX:+ShenandoahVerify -XX:+VerifyObjectEquals -XX:+ShenandoahVerifyOptoBarriers
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 *                    -XX:ShenandoahGCMode=traversal
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 *                    TestVerifyJCStress
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 */
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import java.util.*;
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import java.util.concurrent.*;
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import java.util.concurrent.locks.*;
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public class TestVerifyJCStress {
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    public static void main(String[] args) throws Exception {
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        ExecutorService service = Executors.newFixedThreadPool(
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                2,
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                r -> {
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                    Thread t = new Thread(r);
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                    t.setDaemon(true);
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                    return t;
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                }
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        );
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        for (int c = 0; c < 10000; c++) {
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            final Test[] tests = new Test[10000];
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            for (int t = 0; t < tests.length; t++) {
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                tests[t] = new Test();
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            }
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            Future<?> f1 = service.submit(() -> {
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                IntResult2 r = new IntResult2();
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                for (Test test : tests) {
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                    test.RL_Us(r);
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                }
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            });
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            Future<?> f2 = service.submit(() -> {
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                for (Test test : tests) {
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                    test.WLI_Us();
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                }
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            });
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            f1.get();
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            f2.get();
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        }
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    }
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    public static class IntResult2 {
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        int r1, r2;
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    }
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    public static class Test {
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        final StampedLock lock = new StampedLock();
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        int x, y;
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        public void RL_Us(IntResult2 r) {
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            StampedLock lock = this.lock;
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            long stamp = lock.readLock();
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            r.r1 = x;
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            r.r2 = y;
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            lock.unlock(stamp);
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        }
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        public void WLI_Us() {
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            try {
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                StampedLock lock = this.lock;
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                long stamp = lock.writeLockInterruptibly();
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                x = 1;
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                y = 2;
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                lock.unlock(stamp);
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            } catch (InterruptedException e) {
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                throw new RuntimeException(e);
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            }
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        }
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    }
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}